Scratch awl or the like



April 0 w. L. LUDWICK ,5 3

' SCRATCH AWL OR THE LIKE Filed March 27. 1947- IN VEN TOR.

W/LL/AM L. L UDW/CK ATTORNEYS.

1 accompanying drawings.

Patented Apr. 25 1950 2,505,332 scKATCir AWL'OR THE LIKE William L.hudwick, Mo "signor to The Peck, St

imt Carmel, Conn, as ow & "Wilcox Company,

* southingtomq Conng; acorporation of Congradient 1 Application March27, 1 94?, Serial No.-"737',697.

1 Claim. (Cl..279 -9 My invention relates to construction of awls andthe like devices.

It is an object of my invention to provide an improved scratch awl orthe like device. In this connection, it is desired to simplify theconstruction, improve the effectiveness, and reduce the cost of thesedevices.

Other objects and various further features of the invention will bepointed out or will occur to those skilled in the art from a reading ofthe following specification in conjunction with the In said drawings:

Fig. 1 is a view in partial section of a scratch awl incorporatingfeatures of the invention;

Fig. 2 is an end view of the blade employed in the scratch awl of Fig.1;

Fig. 3 is a fragmentary side view of the blade end shown in Fig. 2; and

Fig. 4 is a partly broken-away perspective view of other parts of thedevice of Fig. 1.

Briefly stated, my'invention contemplates an improved construction forscratch awls or the like, wherein the number of assembly steps may bematerially reduced and the mechanical effectiveness improved-all with asubstantial saving in cost. The improved construction in a preferredform contemplates a blade having an upset end to engage one end of ahandle, and a washer is scufiingly fitted to the blade in the other endI of the handle. The assembly is completed by attachment of a ferrule ofsuch construction that it may lockingly engage the handle, without therequirement of further forming operations.

- Referring to the drawings, my invention is shown in application to ascratch awl having a blade 5 with a shank portion 6 passing through thebore of a handle I. One end of the blade 5 is upset as at 8, and theupset portion 8 is received in a counterbore in the handle 1. To resistrelative rotation of the blade 5 with re spect to the handle I, fins orgussets 9 may be formed at the enlarged portion 8 on the shank 6 sothat, when the blade 5 is inserted into the handle 1, these fins 9 maybite into the handle. In accordance with a feature of the invention, thehandle 1 is secured atits other end to the blade 5 by means of awasheror stop ring l0 having an internal diameter preferably slightly lessthan the external diameter of the shank 6 at the point where the fit isto be made. assembling the washer ID to the shank 6, the washer [0 maybe slipped over the free end of the blade 5 and scuffed or swaged, asthe case may be, along the shank 6 to the position shown in Fig. 1. Ihave found that a fit of this kind for scratch the washer 10 on theshank 6 maybe made-so secure'as'fitomesistidlslodgement until after thehandle 7 and other parts have been destroyed beyond use.

Also in accordance with a feature of the invention, I provide a novelferrule II to embrace the washer l0 and the end of the handle 1 to whichthe washer H1 is adjacent. The ferrule it! may be formed of sheet metal,as by rolling or drawing, and it preferably includes a radially inwardlyprojecting portion or bead I2 lockingly to engage the handle 1. Byforming the internal diameter of the projection l2 substantially equalto or in excess of the external diameter of the washer l0, it will beseen that the ferrule ll may be assembled to the blade handle by asimple press fit. The ferrule II is preferably slightly tapered to fitover the correspondingly tapering end M of handle 7, and the insidediameter of the bead l2 should equal or slightly exceed the diameter ofthe washer in. As the ferrule II is slipped over the handle end l4 andthen pressed into the final position shown, it will be understood thatthe bead 12 will firmly engage the handle 1 to make a permanent fit.

In accordance with still another feature of the invention, the ferrule II may be even more firmly secured to the handle I by forming an internalknurl, serrations, or other tooth-like projections l3 on the innersurface of the projection or bead [2. It will be understood that theknurl l3 need in no way interfere with the ferrules wedging in place onthe handle 5' and that, once in the assembled position shown, thetooth-like projections of the knurl I? may lockingly engage the ferruleagainst rotation with respect to the handle 1. The knurl l3 or otherwiseroughened inner surface of the ferrule Il may be formed so as to leavethe outer surface thereof smooth and, therefore, easy and convenient tomanipulate.

It will be understood that I have described an extremely simpleconstruction for scratch awls and the like. According to thisconstruction, the only necessary assembly operations are a force fit ofthe washer It on the shank 6 and a forced pressing of the ferrule llinto place. Both of these operations may be performed with the simplestof equipment; that is, no elaborate centering or chucking devices arerequired as when a bead or other forming operation is performed (inaccordance with conventional practice) after assembly of the parts. Thenovel construction will also be understood to be extremely rugged andreadily adaptable to screw drivers or the like, as long as the shankdiameter is equal to or exceeds the maximum diameter of the free end ofthe blade.

While I have described my invention in considerable detail for thepreferred form shown, it

will be understood that modifications may be 5 made within the scope ofthe invention as defined in the appended claim.

I claim:

In a device of the character indicated, a blade including a cylindricalshank, a handle with a cylindrical bore no greater in diameter than thediameter of said shank, said shank being inte-' grally formed with anupset end, and the rest of said blade having a maximum transversedimension no greater than the diameter of said shank, whereby said blademay be inserted through said handle until said upset end abuts one endof said handle, and a stop ring around said shank and having an initialinside diameter less than the diameter of said shank and press-fittedover said go shank against the'other end of said handle.

AM L. LUDWICK.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 285,060 Nies Sept. 18, 1883366,308 Derby ...2 July 12, 1887 666,281 Morgan Jan. 22, 1901 797,609Schade Aug. 22, 1905 1,816,359 Carlin July 28, 1931 2,046,733 ForsbergJuly 7, 1936 FOREIGN PATENTS 15 Number I Country Date 348,696 Italy May25, 1937

